The addition of the following two new species of this primitive genus brings the total number of New Zealand species to eight, which may be conveniently separated by the following key:—

1. Mucro tapering with apical tooth only or with no teeth.

2

Mucro with apical and pre-apical teeth.

6

2. Ocelli eight to each side, all large and equal

3

Ocelli eight to each side, unequal.

5

3. Claw with inner teeth.

4

Claw without any teeth, very small blue species. Dens with constriction and with three long ventral setae.

C. granulatus sp. nov.

4. Small dark-blue species. Dens with two very long ventral setae almost as long as itself. Postantennal organ not more than twice as long as an ocellus.

C. minimus Salmon.

Large dark-blue species. Dens with three prominent ventral setae. Postantennal organ three times as long as an ocellus.

C. terrigenus sp. nov.

5. Very dark-blue species. Ocelli seven large and one small to each side. Dens with two long ventral setae and one dorsal apical seta. Postantennal organ twice as long as large ocellus. Mucro with single upturned terminal tooth.

C. okukensis Salmon.

Black species, ocelli six large and two small to each side. Mucro tapering without teeth but with narrow inner lamella.

Body: Length up to 1.5 mm. Antennae a little longer than the head, the four segments related as 20:35:25:48, Ant. IV, with exsertile sensory knob at apex. Ocelli eight to each side all equal. Postantennal organ large elliptical and double outlined, three times as long as an ocellus. Abd. IV a little longer than Abd. III.

Legs: Claw with a single inner tooth at centre, no outer teeth. Empodial appendage half as long as claw with broad outer lamella, narrow semi-outer lamella and short semicircular inner lamella. Two clavate tenent hairs to each foot. On each of the front feet one tenent hair is very much shorter than the other. Otherwise the tenent hairs are as long as the claw.

Furcula: Manubrium to mucrodens as 16:19. Dens with three long prominent ventral setae and one dorso-lateral apical seta. Mucro long and tapering, with a fine recurved apical tooth, and sometimes a slight pre-apical tooth-like swelling.

Colour: In life pale to medium turquoise blue; mounted ground colour of very pale blue or white overlaid with coarse blotchy aggregates of deep-blue pigment granules more concentrated dorsally and dorso-laterally than ventrally. Legs white with only a few blue granules. Antennae more deeply pigmented, the granules concentrated around the joints. Furcula colourless. Ocelli on ill-defined black pigment patches.

Clothing: Thickly clothed with short plain setae, larger and more numerous around posterior of abdomen.

Body: Length up to .66 mm. Antennae about one-third again as long as head, the four segments related as 12:15:15:25. Ant. IV with apical sensory knob and two long straight apical sensory bristles and several sub-apical ones. Ocelli, eight to each side, all large and equal. Postantennal organ large, oval, double-outlined, almost as broad

as long and 1 ⅓ times as long as the diameter of an ocellus. Abds. III and IV approximately equal in length. Ventral tube short and dome-like.

Legs: Claw without any teeth. Empodial appendage reaching to about halfway down claw, with the outer lamella narrow reaching to apex, the inner broad reaching two-thirds down from base, and without tooth at angle. Two slender slightly clavate tenent hairs almost as long as claw to each foot, the clavate portion more hook-shaped than clavate.

Furcula: Short. Manubrium to dens to mucro as 11:10:4. Dens with a constriction two-thirds along from base and with three strong ventral setae. Mucro tapering to a fine slightly upturned point.

Previously known only from Ben More, Canterbury, this species can now be reported from Dean's Bush, Christchurch, under the bark of both rimu and kahikatea trees, where it occurs in large numbers. (Author's Coll.)